Spray coating material for preventing air leakage in roadway, use method thereof and special spray gun

Abstract

The invention discloses a coating material used for preventing the air leakage of a laneway, an application method and a special spray gun thereof. The components of the coating material are clay, cement, sodium silicate, glass fiber and water which are mixed, stirred and made into clay cement slurry according to certain proportion and processes. The clay cement slurry is transported to an underground spraying area by a slurry pump through a grouting pipe, and sprayed to a coal roadway wall by the special spray gun to prevent the air leakage of the laneway. The clay cement slurry has strong suspension property, short initial concreting time, certain strength after solidification, rinse-resistance, not easy craze, excellent air partition performance, strong flame-retardant property, ideal effect of preventing the air leakage of the laneway, quick shotcreting process operations, safety and simplicity, is applicable to the spraying to the coal roadway walls of mines with serious hazards, and prevents the air leakage of the laneway so as to reduce the possibility of the occurrence of spontaneous combustion.

Description

technical field [0001] The invention relates to a sprayed roadway wall surface material used in coal mine safety production, especially a sprayed material used to prevent roadway air leakage. The invention also relates to a method for using the sprayed material and a special spray gun in the method. Background technique [0002] Coal spontaneous combustion is one of the main natural disasters in mines in my country. To prevent fire extinguishing, it is necessary to spray air-isolation materials on the roadway walls to prevent air leakage in the roadway and reduce the possibility of spontaneous combustion in coal seams and goafs. [0003] At present, the commonly used materials for spraying roadway walls include cement mono-slurry, concrete and polyurethane. Due to the poor adhesion of cement single slurry, the spraying effect is not ideal, and the application effect is poor; spraying concrete needs to transport a large amount of equipment and materials, it is difficult for m...

AI Technical Summary

Problems solved by technology

Due to the poor adhesion of cement single slurry, the spraying effect is not ideal, and the application effect is poor; spraying concrete needs to transport a large amount of equipment and materials, it is difficult for mines with few tracks to be laid, and the cost of spraying is high and the efficiency is low; polyurethane materials are easy to Combustible, high requirements for spraying equipment, inconvenient operation, and cracks are likely to occur after polyurethane curing, affecting the effect of wind isolation

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